<?php

if (! defined ( 'BASEPATH' ))
	exit ( 'No direct script access allowed' );
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------


/**
 * Logging Class
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Logging
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/general/errors.html
 */
class CI_Log {
	
	protected $_log_path;
	protected $_threshold = 1;
	protected $_date_fmt = 'Y-m-d H:i:s';
	protected $_enabled = TRUE;
	protected $_levels = array ('ERROR' => '1', 'DEBUG' => '2', 'INFO' => '3', 'ALL' => '4' );
	
	/**
	 * Constructor
	 */
	public function __construct() {
		$config = & get_config ();
		
		$this->_log_path = ($config ['log_path'] != '') ? $config ['log_path'] : APPPATH . 'logs/';
		
		if (! is_dir ( $this->_log_path ) or ! is_really_writable ( $this->_log_path )) {
			$this->_enabled = FALSE;
		}
		
		if (is_numeric ( $config ['log_threshold'] )) {
			$this->_threshold = $config ['log_threshold'];
		}
		
		if ($config ['log_date_format'] != '') {
			$this->_date_fmt = $config ['log_date_format'];
		}
	}
	
	// --------------------------------------------------------------------
	

	/**
	 * Write Log File
	 *
	 * Generally this function will be called using the global log_message() function
	 *
	 * @param	string	the error level
	 * @param	string	the error message
	 * @param	bool	whether the error is a native PHP error
	 * @return	bool
	 */
	public function write_log($level = 'error', $msg, $php_error = FALSE) {
		if ($this->_enabled === FALSE) {
			return FALSE;
		}
		
		$level = strtoupper ( $level );
		
		if (! isset ( $this->_levels [$level] ) or ($this->_levels [$level] > $this->_threshold)) {
			return FALSE;
		}
		
		$filepath = $this->_log_path . 'log-' . date ( 'Y-m-d' ) . '.php';
		$message = '';
		
		if (! file_exists ( $filepath )) {
			$message .= "<" . "?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed'); ?" . ">\n\n";
		}
		
		if (! $fp = @fopen ( $filepath, FOPEN_WRITE_CREATE )) {
			return FALSE;
		}
		
		$message .= $level . ' ' . (($level == 'INFO') ? ' -' : '-') . ' ' . date ( $this->_date_fmt ) . ' --> ' . $msg . "\n";
		
		flock ( $fp, LOCK_EX );
		fwrite ( $fp, $message );
		flock ( $fp, LOCK_UN );
		fclose ( $fp );
		
		@chmod ( $filepath, FILE_WRITE_MODE );
		return TRUE;
	}

}
// END Log Class

/* End of file Log.php */
/* Location: ./system/libraries/Log.php */